(widget-string-complete): New.

(widget-coding-system-prompt-value-history): Deleted.
(coding-system): Use coding-system-value-history.

diff --git a/lisp/wid-edit.el b/lisp/wid-edit.el
index 783c0efbf37dea9f35792e3d958a9540620dafa4..1ac4e3c2542b1b27765d4164fab86bc9aac180cc 100644 (file)
--- a/lisp/wid-edit.el
+++ b/lisp/wid-edit.el
@@ -2870,6 +2870,43 @@ as the value."
   :complete-function 'ispell-complete-word
   :prompt-history 'widget-string-prompt-value-history)
 
+(eval-when-compile (defvar widget))
+
+(defun widget-string-complete ()
+  "Complete contents of string field.
+Completions are taken from the :completion-alist property of the
+widget.  If that isn't a list, it's evalled and expected to yield a list."
+  (interactive)
+  (let* ((prefix (buffer-substring-no-properties (widget-field-start widget)
+                                                (point)))
+        (completion-ignore-case (widget-get widget :completion-ignore-case))
+        (alist (widget-get widget :completion-alist))
+        (_ (unless (listp alist)
+             (setq alist (eval alist))))
+        (completion (try-completion prefix alist)))
+    (cond ((eq completion t)
+          (when completion-ignore-case
+            ;; Replace field with completion in case its case is different.
+            (delete-region (widget-field-start widget)
+                           (widget-field-end widget))
+            (insert-and-inherit (car (assoc-ignore-case prefix alist))))
+          (message "Only match"))
+         ((null completion)
+          (error "No match"))
+         ((not (eq t (compare-strings prefix nil nil completion nil nil 
+                                      completion-ignore-case)))
+          (when completion-ignore-case
+            ;; Replace field with completion in case its case is different.
+            (delete-region (widget-field-start widget)
+                           (widget-field-end widget))
+            (insert-and-inherit completion)))
+         (t
+          (message "Making completion list...")
+          (with-output-to-temp-buffer "*Completions*"
+            (display-completion-list
+             (all-completions prefix alist nil)))
+          (message "Making completion list...done")))))
+
 (define-widget 'regexp 'string
   "A regular expression."
   :match 'widget-regexp-match
@@ -3025,16 +3062,13 @@ It will read a directory name from the minibuffer when invoked."
                       (interactive)
                       (lisp-complete-symbol 'boundp))
   :tag "Variable")
-
-(defvar widget-coding-system-prompt-value-history nil
-  "History of input to `widget-coding-system-prompt-value'.")
   
 (define-widget 'coding-system 'symbol
   "A MULE coding-system."
   :format "%{%t%}: %v"
   :tag "Coding system"
   :base-only nil
-  :prompt-history 'widget-coding-system-prompt-value-history
+  :prompt-history 'coding-system-value-history
   :prompt-value 'widget-coding-system-prompt-value
   :action 'widget-coding-system-action
   :complete-function (lambda ()